package com.ydgg.ltar.util;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
/**
 * AES工具类
 * @author Administrator
 *
 */
public class AES {

	private static final byte[] enCodeFormat = StringUtils.parseHexStr2Byte("E527182DA43BA5164175BCF8DE8646CE");
	
	/**
	 * 加密
	 * @param content 需要加密的内容
	 * @param password  加密密码
	 * @return
	 */ 
	public static byte[] encrypt(String content) { 
		try {            
//			KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
//			kgen.init(128, new SecureRandom(password.getBytes())); 
//			SecretKey secretKey = kgen.generateKey(); 
//			byte[] enCodeFormat = secretKey.getEncoded(); 
			
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); 
			Cipher cipher = Cipher.getInstance("AES");// 创建密码器 
			byte[] byteContent = content.getBytes("utf-8"); 
			cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化 
			byte[] result = cipher.doFinal(byteContent); 
			return result; // 加密 
		} catch (NoSuchAlgorithmException e) { 
			e.printStackTrace(); 
		} catch (NoSuchPaddingException e) { 
			e.printStackTrace(); 
		} catch (InvalidKeyException e) { 
			e.printStackTrace(); 
		} catch (UnsupportedEncodingException e) { 
			e.printStackTrace(); 
		} catch (IllegalBlockSizeException e) { 
			e.printStackTrace(); 
		} catch (BadPaddingException e) { 
			e.printStackTrace(); 
		} 
		return null; 
	}
	
	/**
	 * 解密
	 * @param content  待解密内容
	 * @param password 解密密钥
	 * @return
	 */ 
	public static byte[] decrypt(byte[] content) { 
		try { 
//			KeyGenerator kgen = KeyGenerator.getInstance("AES"); 
//			kgen.init(128, new SecureRandom(password.getBytes())); 
//			SecretKey secretKey = kgen.generateKey(); 
//			byte[] enCodeFormat = secretKey.getEncoded(); 
			
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");   
			Cipher cipher = Cipher.getInstance("AES");// 创建密码器 
			cipher.init(Cipher.DECRYPT_MODE, key);// 初始化 
			byte[] result = cipher.doFinal(content); 
			return result; // 加密 
		} catch (NoSuchAlgorithmException e) { 
			e.printStackTrace(); 
		} catch (NoSuchPaddingException e) { 
			e.printStackTrace(); 
		} catch (InvalidKeyException e) { 
			e.printStackTrace(); 
		} catch (IllegalBlockSizeException e) { 
			e.printStackTrace(); 
		} catch (BadPaddingException e) { 
			e.printStackTrace(); 
		} 
		return null; 
	} 
}
